Super-resolution imaging system and method based on filtering incoherent light field intensity high-order autocorrelation

Abstract

The invention discloses a super-resolution imaging system and method based on filtering incoherent light field intensity high-order self-correlation. The super-resolution imaging system comprises an incoherent light source, an imaging lens, an area array detector, a space threshold filter and a high-order intensity self-correlation operation system. The light emitted by the incoherent light source irradiates a target object, and the light transmitted or reflected and scattered by the object passes through the lens with the focal length F and then is imaged on the area array detector with the spatial resolution capability. The area array detector controls a data acquisition time sequence through external triggering, acquires an instant area array intensity signal at each moment, inputs the instant area array intensity signal to the intensity space filter with a set proper threshold value for filtering operation, and performs high-order intensity self-correlation operation according to the filtered spatial intensity distribution area array data to reconstruct an image of the target object. The method has the capability of resisting atmospheric disturbance, turbulence and other severe weather influences, can realize super-resolution imaging, and has important significance in various fields needing high-resolution imaging, such as microscopic imaging and remote sensing.

Description

technical field [0001] The invention relates to the field of super-resolution imaging of incoherent light, in particular to a super-resolution imaging system and method based on high-order autocorrelation of filtered incoherent light field intensity. Background technique [0002] In the field of optics, due to the limitation of Rayleigh diffraction limit, the imaging resolution cannot resolve two points smaller than half the wavelength in the distant area, nor can it obtain a focused spot with a size below half the wavelength. The spatial resolution is very low, on the order of 200nm. In practical applications, the imaging resolution is also affected and limited by the noise and bandwidth of the optical system and detection system, and the actual spatial resolution is lower. With the remarkable development of nanotechnology, medical imaging technology, etc., the desire for higher spatial resolution has become more prominent. How to overcome the diffraction limit? Go beyond...

AI Technical Summary

Problems solved by technology

Although correlative imaging technology has higher imaging resolution than traditional imaging under the same conditions, it is still subject to the diffraction limit of the imaging system. At the same time, the imaging resolution and contrast of correlative imaging technology are mutually restrictive. Usually, High resolution imaging results in very low contrast, a disadvantage of correlative imaging techniques

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